[Zope3-Users] store persistent objects

[Leticia Larrosa]

Hi all

Resume:

I want to store persistent data in the zope database. I must have an object
that store others object inside it, including list of objects, etc. I want
that when I create the root object automatically create object inside it.

Example of python class:
"""
class Leave:
	name = u""
	(...)

class RootIndex:
	index_list = []
	(...)	
	
class Root:
	name = u""
	rootIndex = None
	leave_list = []
	
	def __init__(self): 
		self.rootIndex = RootIndex()
"""

I want store this data, for future access to it throw the user interface. I
don't know which way is the best, even I don't have any way to do that yet
;)

Any idea will be appreciated.

Details:

I create the following classes, interfaces and zcml directives and get the
error when I create a persistent_test throw the ZMI:

"""
AttributeError: 'persistent_test' object has no attribute
'_SampleContainer__data'
"""

My container overrides __init__ and set the __data value in my class ?

(...)
"""
class IPadre(Interface):
    nombre_padre = zope.schema.TextLine(
        title=u"nombre padre",
        required=True,
        )
    hijo = zope.schema.Object(
        schema=IHijo,
        )

class Padre(Persistent):
    implements(IPadre)
    nombre_padre = u""
    hijo = Hijo(u"")
    
    def __init__(self, a_nombre_padre, a_nombre_hijo):
        self.nombre_padre = a_nombre_padre
        self.hijo = Hijo(a_nombre_hijo)

class Ipersistent_test(IContainer):
    def __setitem__(name, object):
        """ Add an Ipersistent_test object. """
    
class persistent_test(BTreeContainer):
    implements(Ipersistent_test)
    def __init__(self):
        self['un_padre'] = Padre('Lety','Campanilla')

"""

In my configure.zcml
"""

<interface
      interface="persistent_test.Ipersistent_test"
      type="zope.app.content.interfaces.IContentType"
      />
<content class="persistent_test.persistent_test">
    <implements
        interface="zope.app.annotation.interfaces.IAttributeAnnotatable"
        />
    <implements
        interface="zope.app.container.interfaces.IContentContainer"
        />
    <factory id="persistent_test.persistent_test" description="persistent
test"/>
    <require 
        permission="zope.ManageContent" 
        interface="persistent_test.Ipersistent_test"
        />
  </content>

<interface
      interface="persistent_test.IPadre"
      type="zope.app.content.interfaces.IContentType"
      />
  <content class="persistent_test.Padre">
    <implements
        interface="zope.app.annotation.interfaces.IAttributeAnnotatable"
        />
    <implements
        interface="zope.app.container.interfaces.IContentContainer"
        />
    <factory id="persistent_test.Padre" description="Padre"/>
    <require 
        permission="zope.ManageContent" 
        interface="persistent_test.IPadre"
        />
    <require 
        permission="zope.ManageContent" 
        set_schema="persistent_test.IPadre"
        />
  </content>

<browser:addMenuItem
      class="persistent_test.persistent_test"
      title="Persistent Test"
      permission="zope.ManageContent"
  />

"""


Traceback:
"""
Traceback (innermost last):
  Module zope.publisher.publish, line 138, in publish
    result = publication.callObject(request, object)
  Module zope.app.publication.zopepublication, line 164, in callObject
    return mapply(ob, request.getPositionalArguments(), request)
  Module zope.publisher.publish, line 113, in mapply
    return debug_call(object, args)
   - __traceback_info__: <BoundPageTemplateFile of
<zope.app.publisher.browser.viewmeta.Contents object at 0x02847850>>
  Module zope.publisher.publish, line 119, in debug_call
    return object(*args)
  Module zope.app.pagetemplate.viewpagetemplatefile, line 83, in __call__
    return self.im_func(im_self, *args, **kw)
  Module zope.app.pagetemplate.viewpagetemplatefile, line 51, in __call__
    sourceAnnotations=getattr(debug_flags, 'sourceAnnotations', 0),
  Module zope.pagetemplate.pagetemplate, line 117, in pt_render
    strictinsert=0, sourceAnnotations=sourceAnnotations)()
  Module zope.tal.talinterpreter, line 239, in __call__
    self.interpret(self.program)
  Module zope.tal.talinterpreter, line 314, in interpret
    handlers[opcode](self, args)
  Module zope.tal.talinterpreter, line 869, in do_useMacro
    self.interpret(macro)
  Module zope.tal.talinterpreter, line 314, in interpret
    handlers[opcode](self, args)
  Module zope.tal.talinterpreter, line 502, in do_optTag_tal
    self.do_optTag(stuff)
  Module zope.tal.talinterpreter, line 487, in do_optTag
    return self.no_tag(start, program)
  Module zope.tal.talinterpreter, line 482, in no_tag
    self.interpret(program)
  Module zope.tal.talinterpreter, line 314, in interpret
    handlers[opcode](self, args)
  Module zope.tal.talinterpreter, line 839, in do_defineMacro
    self.interpret(macro)
  Module zope.tal.talinterpreter, line 314, in interpret
    handlers[opcode](self, args)
  Module zope.tal.talinterpreter, line 941, in do_defineSlot
    self.interpret(block)
  Module zope.tal.talinterpreter, line 314, in interpret
    handlers[opcode](self, args)
  Module zope.tal.talinterpreter, line 931, in do_defineSlot
    self.interpret(slot)
  Module zope.tal.talinterpreter, line 314, in interpret
    handlers[opcode](self, args)
  Module zope.tal.talinterpreter, line 839, in do_defineMacro
    self.interpret(macro)
  Module zope.tal.talinterpreter, line 314, in interpret
    handlers[opcode](self, args)
  Module zope.tal.talinterpreter, line 552, in do_setLocal_tal
    self.engine.setLocal(name, self.engine.evaluateValue(expr))
  Module zope.tales.tales, line 698, in evaluate
    return expression(self)
   - C:\Python24\Lib\site-packages\zope\app\container\browser\contents.pt
   - Line 7, Column 4
   - Expression: <PathExpr standard:'view/listContentInfo'>
   - Names:
      {'args': (),
       'context': <zope.app.folder.folder.Folder object at 0x01986EF0>,
       'default': <object object at 0x00A8C500>,
       'loop': {},
       'nothing': None,
       'options': {},
       'repeat': {},
       'request': <zope.publisher.browser.BrowserRequest instance
URL=http://localhost:8080/@@contents.html>,
       'template':
<zope.app.pagetemplate.viewpagetemplatefile.ViewPageTemplateFile object at
0x01782910>,
       'usage': <zope.pagetemplate.pagetemplate.TemplateUsage object at
0x028475F0>,
       'view': <zope.app.publisher.browser.viewmeta.Contents object at
0x02847850>,
       'views': <zope.app.pagetemplate.viewpagetemplatefile.ViewMapper
object at 0x02847B70>}
  Module zope.tales.expressions, line 204, in __call__
    return self._eval(econtext)
  Module zope.tales.expressions, line 198, in _eval
    return ob()
  Module zope.app.container.browser.contents, line 82, in listContentInfo
    self.addObject()
  Module zope.app.container.browser.contents, line 248, in addObject
    adding.action(request['type_name'], new)
  Module zope.app.container.browser.adding, line 146, in action
    content = factory()
  Module zope.component.factory, line 37, in __call__
    return self._callable(*args, **kw)
  Module persistent_test, line 46, in __init__
    self['un_padre'] = Padre('Lety','Campanilla')
  Module zope.app.container.sample, line 86, in __setitem__
    setitem(self, self.__data.__setitem__, key, object)
AttributeError: 'persistent_test' object has no attribute
'_SampleContainer__data'
"""


Thanks in advanced.

Leticia Larrosa




__________________________________________

XIII Convención Científica de Ingeniería y Arquitectura
28/noviembre al 1/diciembre de 2006
Cujae, Ciudad de la Habana, Cuba
http://www.cujae.edu.cu/eventos/convencion